Water not running smooth.

Oct 2, 2014
46
Benneteau Oceanis 361 from 2001 Gruissan, France
From all my taps on my 2001 B361 the water is coming out in bursts as if there is trapped air somewhere in the system, but I can not find anywhere to went the system.
 
Sep 15, 2009
6,243
S2 9.2a Fairhope Al
check and see if you have an accumulator in your water system and if you do not install one ...it keeps the water pressure from pulsating .....

 
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Jun 21, 2004
2,916
Beneteau 343 Slidell, LA
Has this ever happened in the past?
Try filling the tank and open one faucet at a time 9both hot & cold) until it is running smoothly, then shut the faucet and go to the next faucet and open until it runs smoothly. Continue in same fashion until all of the trapped air is vented. Might have to repeat the entire cycle to eliminate all air. This happens on my 343 if I let the tank run dry. If this doesn't help, check the filter, and pump impeller--might be time for a pump rebuild. As Woody mentioned, an accumulator will help also; however, you have to purge all of the air out of the system first.
 
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JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
7,771
Hunter 430 Waveland, MS
trapped air
You most likely have a air leak on the suction side of your water pump. Trapped air acts like Woodster's accumulator.
From a dead pump supply stop, turn off your pump breaker, open your sink valve and catch/measure your spigot discharge.
If less than a half cup of water, no working accumulator installed.;)
Jim...
 
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Oct 2, 2014
46
Benneteau Oceanis 361 from 2001 Gruissan, France
Thanks for your help. I can not find any accumulator, but still could get over half a liter out. I always run separate tanks and shift when one is empty which probably gives me air in the system. Bleading the taps did help a little, but stil I hope to find a place to bleed the air.
 

JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
7,771
Hunter 430 Waveland, MS
still could get over half a liter out
That is the size of the largest standard sporting boat accumulator. It would take about an air volume of ≈1 liter to act like an accumulator's diaphragm, to get that water volume ( 2 cups) out.

I have a dual tank manifold and my water tanks are at different heights relative to the pump suction. If one of the two tank's selection valves are not fully closed, you will draw air from the tank that is empty and higher than the pump suction.

My pump has to lift water from the lowest tank, therefore creating a slight vacuum at the pump inlet. I had the same problem and had to watch the air, in the suction strainer, disappear as I carefully tighten the empty tank valve.

An accumulator will be installed on the pump outlet, and the one pictured above is about 1 - 1.5 liter in size.
_______
If by fully opening your sink spigot and running for, say 2 minutes, you still get air, then I am betting it is an air leak on the inlet side of your pump. That spigot is your vent!;)
Jim...
 
Oct 2, 2014
46
Benneteau Oceanis 361 from 2001 Gruissan, France
Thanks for the picture Philip. I got the mounting, but no accumulator, so maybe it has been removed, when it stopped working. I will look for one. Thanks.
 

JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
7,771
Hunter 430 Waveland, MS
science or science fiction
After reading some of SBO posts, science fiction was included.
After rereading my post, it must be coincidental that I said a PINT of water should be maximum water from the accumulator and Claus measured about half liter. Hmmmmm 2 cup = pint ≈ half liter;). I leave up to the readers.
Science, Science Fiction, or dumb luck guessing.:waycool:
_______
It is hard to understand how a liter of air could be trapped on the pressure side in Claus's system.
Jim...

PS: Speaking of Dumb luck, I am heading to the PowerBall lottery ticket spot tomorrow.:p
 
Oct 2, 2014
46
Benneteau Oceanis 361 from 2001 Gruissan, France
I installed a 1 liter Jabsco accumulator, but when I put pressure on I saw, that there was a leak in the jar on the strainer before the pump. It had been closed too tightly. I fixed it with araldit and changed it with the bathroom strainer and now the water runs smooth. Thank you all for your help.